linux-kernel - Re: Regression: NULL pointer dereference after NFS_V4_2_READ

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Message-ID: <9dda9e11-565f-8725-6d15-803a66782753@leemhuis.info>
Date:   Tue, 21 Feb 2023 15:24:52 +0100
From:   "Linux regression tracking (Thorsten Leemhuis)" 
        <regressions@...mhuis.info>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Linux regressions mailing list <regressions@...ts.linux.dev>,
        Anna Schumaker <Anna.Schumaker@...app.com>,
        Trond Myklebust <trond.myklebust@...merspace.com>
Cc:     linux-nfs@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Regression: NULL pointer dereference after NFS_V4_2_READ_PLUS
 (commit 7fd461c47)

On 18.02.23 16:09, Krzysztof Kozlowski wrote:
> On 18/02/2023 05:42, Linux regression tracking #update (Thorsten
> Leemhuis) wrote:
>> [TLDR: This mail in primarily relevant for Linux regression tracking. A
>> change or fix related to the regression discussed in this thread was
>> posted or applied, but it did not use a Link: tag to point to the
>> report, as Linus and the documentation call for. Things happen, no
>> worries -- but now the regression tracking bot needs to be told manually
>> about the fix. See link in footer if these mails annoy you.]
>>
>> On 08.01.23 09:52, Linux kernel regression tracking (#adding) wrote:
>>> On 07.01.23 16:44, Krzysztof Kozlowski wrote:
>>>>
>>>> Bisect identified commit 7fd461c47c6c ("NFSv4.2: Change the default
>>>> KConfig value for READ_PLUS") as one leading to NULL pointer exception
>>>> when mounting NFS root on NFSv4 client:
>>> [...]
>>> Thanks for the report. To be sure the issue doesn't fall through the
>>> cracks unnoticed, I'm adding it to regzbot, the Linux kernel regression
>>> tracking bot:
>>>
>>> #regzbot ^introduced 7fd461c47
>>> #regzbot title nfs: NULL pointer dereference since NFS_V4_2_READ_PLUS is
>>> enabled by default
>>> #regzbot ignore-activity
>>
>> #regzbot fix: 896e090eefedeb8a715ea19938a2791c32679
> 
> I see it was posted and merged as "Revert "NFSv4.2: Change the default
> KConfig value for READ_PLUS"". It's nice to give credits to people who
> report bugs with "Reported-by" tag.

Yup. And a "Link:" with the url to the report is missing as well (Linus
wants those, automatic regression tracking needs those [IOW: if they are
missing it causes me trouble, that's why I care], and the docs explain
this as well).

That's why I asked for those two tags, but I didn't even get a reply:

https://lore.kernel.org/all/8d26e819-a3a5-7ae1-bb9e-56bacfa7f65b@leemhuis.info/

Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
--
Everything you wanna know about Linux kernel regression tracking:
https://linux-regtracking.leemhuis.info/about/#tldr
If I did something stupid, please tell me, as explained on that page.